751 CE - 756 CE
753 CEPossible first use of The Donation of Constantine in coercing Pepin the Short to donate his lands to the Church.
1054 CEMost dramatic use of The Donation of Constantine by Pope Leo IX to justify Church's supremacy and involvement in temporal affairs.
1439 CE - 1440 CEThe Donation of Constantine proven a forgery by priest and scholar Lorenzo Valla.
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